Calculating machine



A. F. POTT April 25, 1944.

CALCULATING MACHINE, CASH REGISTER, OR THE LIKE Filed Dec. 29, 1937 8 Sheets-Sheet 1 153 4 A. F. POTT 2,34TQ6W CALCULATlNG MACHINE, CASH REGISTER, OR THE LIKE Filed Dec. 29, 195? 8 Sheets-Sheet 2 A wifi 1944 1.,

A. F. POT)? CALCULATING MACHINE, CASH REGISTER OR THE LIKE Filed Dec. 29, 1937 8 Sheets-Sheeu 5 CALCULATING MACHINE A. F. PQJ'iFT 7965M) CASH REGISTER, OR THE LIKE 7 Filed Dec. 29, 1937 8 Shawna-Sheet 4;

I m9 m5 April 25, 1944. POTT 2,347,610

CALCULATING MACHINE, CASH REGISTER, OR THE LIKE Filed Dec. 29, 1937 8 Sheets-Sheet 5 my. a

M //65/3os/ I l l Apnl 25, 1944. A. F. POTT 2,347,610

CALCULATING MACHINE, CASH REGISTER, OR THE LIKE Filed Dec. 29, 1937 8 Sheets-Sheet A. F. POTT April 25, 1944.

'8 Sheets-Sheet 7 Filed Dec. 29, 1957 April 25, 1944. POTT 2,347,610

CALCULATING MACHINE CASH REGISTER, OR THE LIKE Filed Dec. 29, 1937 I 8 Sheets-Sheet 8 H 42 AZZVM wen/12 1A Patented Apr. 25, 1944 CALCULATING MACHINEL CASH REGISTER, OR THE LIKE August Friedrich Pott, Zella-Mehlis, Thuringia,

Germany; vested in the Alien Property Custodian Application December 29, 1937, Serial No. 182,336 In Germany August 18, 1934 2 Claims.

This application is a continuation in part of my applications Ser. 35,546 and 83,751 and relates to calculating machines, cash registers or the like having totalizers moved by the paper carriage for the simultaneous calculation of all the denominations of a multi-denominational value.

In these machines, as is known, totalizers of different width are used and are disposed as required on the carriage. The actuating mechanism, therefore must have a number of actuator segments and type-printing rods corresponding to the widest totalizer.

When a narrow totalizer is located over the actuating mechanism, no difficulties are encountered in holding the actuator segments lying to the left adjacent the totalizer in their rest position since they were not set from the keyboard for any movement.

On the contrary difiiculties are encountered in total-taking, since in this case only those actu-' ators need be operated which stand opposite to the operative totalizer and within the width of this totalizer only those actuator segments which stand opposite to the denominations containing a value.

These difilculties were attempted to be overcome in calculating machines in which the drive of the type-printing members in the setting direction was eifected by spring power, by incorporating in the machine a locking mechanism which was released in dependence upon the totalizer in the working position by a control member arranged on this totalizer so that only the denominations of the actuator mechanism were released which correspond to the number of the denominations of the totalizer in the working position. In these totalizers, however, no means were provided for automatically preventing errors in total-taking due to the totalizers being incorrectly set through inattention or mistake on the part of the operator. These devices, moreover, were unsuitable for overcoming the difficulties in machines in which both the forward and backward movements of the totalizer actuating members and of the type-printing rods were effected positively.

According to the invention these difliculties are overcome in this type of machine also, by providing for each totalizer a zeroizing device operated preferably by a power drive and by taking totals by this zeroizing device. By this construction the provision of a locking mechanism is dispensed with so that the building of the machine is simplified. Also, with this arrangement security is provided against incorrect settings. 1

In the drawings, one example of construction of the invention is represented.

Figure 1 is a sectional view in side elevation of the coupling mechanism for the register in its rest position. The right hand side wall of the machine is removed for the sake of clearness.

Figure 2 shows a side elevation according to Fig. 1, in which view the arrangement of the resetting device is illustrated.

Figure 3 shows a side elevation of the coupling mechanism for the total taking mechanism.

Figure 4 shows a perspective elevation, viewed from the left hand front of the machine, of the arrangement of the couplings, in which view different parts for the sake of clearness are represented drawn out from one another.

Figure 5 shows in perspective a detail of Fig. 1.

Figure 6 shows a perspective elevation, viewed from the left hand front of the machine, of the arrangement of the resetting device, in which view different parts for the sake of clearness are represented drawn out from one another.

Figure 7 shows a longitudinal section according to Fig. 6.

Figure 8 shows a side elevation of the resetting shaft in its home position.

Fig. 9 shows likewise a side elevation of the resetting device according to Fig. 6 in which view the resetting shaft is shown in an intermediate working position.

Figure 10 shows a further side elevation of the resetting device according to Fig. 6 in which view the resetting shaft is shown in the working position, at the time the resetting process is just brought to an end.

Fig. 11 is a view in side elevation of the coupling mechanism located on the right hand side of its supporting plate;

Fig. 12 is a similar View showing the parts of the coupling mechanism located on the left hand or inner side of th supporting plate;

Fig. 13 is a detail sectional view through the coupling mechanism, with the parts in their normal positions;

Fig. 14 is a detail perspective view showing certain gear parts in disassembled position;

Fig. 15 is another detail perspective view of a part of the coupling control;

Fig. 16 is a disassembled perspective view from the left front of the machine, showing'the adjusting and indicating wheels and the restoring mechanism therefory Fig. 1'7 is a plan view of the machine, which the cover plates and the paper carriage are removed for the sake of clearness, and parts omitted to enable the clearer disclosure of others, and Fig. 18 is a fragmentary perspective view of a detail of the total key lever.

On the right hand side of the machine the addition key lever 4, the multiplication key lever 5 and the total key lever 9 are arranged. The forwardly directed end of the addition key lever d is bent upwards (Figs. 1 and 12) and the free upwardly directed end again bent off at right angles to the left is provided with the marking Add." The forwardly and upwardly directed free end of the key lever 5 is bent off at right angles to the right and provided with the marking Mult. The free forwardly directed end of the key lever 6 is provided with a key 8, which is marked with T (Fig. 3 Further a motor 9 (Fig. 11) is removably attached on the right hand side of the machine. The rotations of the motor 9 are transferred through a worm I (Fig. 11) and a worm wheel I! to a driving shaft I2. The motor 9 is switched in by means of a handle I3, which is likewise arranged on the right hand side of the machine. On the rear side of the machine the paper carriage I4 (Fig. 1) is arranged. On the paper carriage I4 as many totalizers It as desired of different widths are arranged on a totalizer attaching rail I5.

Upon throwing the main switch handle to its On position, the motor 9 commences to rotate. The main drive shaft I2 and the toothed wheel 2| mounted on the shaft are rotated in the arrow direction 22 (Fig. 11) by way of the worm I0 and the worm wheel II.

Operation of the drive for the adding and printing mechanism If it is desired to add and print the set up value the key 84 (Figs. 12 and 2) is depressed, whereby the key lever 4 is rocked round the screw 85 in the clockwise direction against the action of the spring 86 which engages with it. Hereby, the angle-lever 81 (Figs. 12 and 15) is rocked in the anti-clockwise direction round the screw 88 through the intermediary of the connecting rod 89 which connects the lever 4 with one end of the angle lever 81. Consequently the nose 92 of the pawl 90 pivotally arranged on the coupling lever 81 by means of a screw 9|, enters the path of movement of the nose 93 of the coupling pawl 94 (Figs. 4, 12 and 13). Furthermore, on depression of the key 84 the lug 95 (Figs. 17 and 12) bent off from the key lever 4 acts on the key lever and rocks the same likewise in the clockwise direction round the screw 85. In this movement the projection 96 of the rearwardly directed part of the key lever 5 acts upwards against the bridge 91 (Fig. 12) of the U-shaped part of the coupling lever 98, whereby the latter is rocked round the screw 99 in the clockwise direction against'the action of the spring I0. Hereby the nose IOI of the coupling lever 98 releases the nose 93 (Figs. 12 and 13) of the coupling pawl 94 located in the coupling casing I02. The coupling pawl 94 under the action of the. spring I03 engaging with its nose I04 (Fig. 13) cannow swing round the pin I05 in the anticlockwise direction, whereby the nose I06 of the coupling pawl 94 comes into the path of movement of the cam I01 rigidly mounted on the main drive shaft I2. Since, as already described, the shaft I2 and the cam I01 are already in rotation, owing to the switching in of the motor 9. the

nose of the cam I0'I acts on the nose I06 of the coupling pawl 94 which has been brought into engagement with it. Since this pawl, in consequence of the action of the spring I03 is held in engagement with the cam I01, the latter takes along with it the pawl 94 and consequently also the coupling casing I02 in the arrow direction 22.

In the rotation of the coupling I02 in the arrow direction 22 the rod I08 (Fig. 4) is moved in the arrow direction I00, owing to its connection to the cover H0 of the coupling housing I02 by means of the headed screw III. By the movement of the rod I06 in the arrow direction I09 the stub shaft H2, fixed to the rod I08 is equally moved in the direction of the arrow I09. As a result, the link II3 (Figs. 4 and 16) is moved in the arrow direction I09, rotating thereby the arm H4 in the direction of the arrow I I5. The arm H4 is rigidly mounted on a shaft I I5, rotatably mounted in the machine frame 33. On the other end of the shaft H6, a second arm II! is rigidly mounted to which a link I I8 is pivoted which latter carries a stub shaft II9 arranged in axial alignment with the stub shaft II2. In the rotation of the shaft I I6 participates also the toothed wheel I20 (Figs. 1, 2 and 16).

Simultaneously with said movement of the parts I02, I08, II2, the parts 264, 263 are moved in the same direction, whereby the shaft 240 (Fig. 4.) is rotated likewise in the arrow direction II5. However no further mechanisms are operated thereby.

Since the toothed wheel I20 is in engagement with the toothed wheel I2I (Fig. 2) mounted on the shaft I22, the toothed wheel I2I is rotated in the arrow direction I23. The toothed wheel I24 mounted on the shaft I 25 and standing in engagement with the toothed wheel I20 is hereby rotated in the arrow direction I 26.

The cams I21 and I28 (Figs. 1, 5 and 17) rigidly mounted on the shaft I 25 also participate in the rotation of the shaft I25 in the arrow direction I26. The cam I21 may be called the total cam because it controls the totalizer in total taking, whereas the cam I28 may be called the adding cam because it controls the totalizer in addition. Normally the cam I28 is in contact with the nose I29 oi the lever I30 and as the nose I29 of the lever I30 in the rotation of the cam I28 in the arrow direction I26 slides on the lower part of the cam I28 (Fig. 1) the latter has no action during the first half of its revolution on the lever I30.

Consequently, the nose I3I may not act on the lug I32 of the totalizer frame I33, swingable round the shaft I34 (Fig. 1).

Referring now again to the stub shafts H9 and H2 in Fig. 16, it may be noted that each of them is pivotally connected to toothed sectors I36 and I31. The stub shafts H9 and H2 are guided in slots (not shown) in the side walls of the machine frame, which slots are concentrically arranged with the toothed sectors I 36 and I31. The toothed sectors I36 and I31 are connected by a bar I 30, cooperating with noses I39 (Figs. 1 and 2) on the actuators I9.

When the toothed sectors I36 (Fig. 16) and I3! are acted upon in the arrow direction I40 by way of the levers H3 and H8 in the above mentioned rotation of the levers H4 and II"! in the arrow direction I I5, the bar I 36 also travels in the arrow direction 54, whereby the noses I39 (Figs. 1 and 2) of the actuators I 9 are released for movement. In this operation the toothed se m HI and I42 (Fig. 16) g ems which are in engagement.

with the toothed sectors I36 and I31 are swung round the shaft 64 in the clockwise direction in which swinging movement the beam 16 projecting into the recesses I43 and I44 of the toothed segments MI and I42 also participates. In the swinging movement of the beam 16 in the clockwise direction round the shaft 64, this beam 16 acts successively on the edges I45 of the adjusting and indicating wheels 51 and swings the same in succession according as the adjusting and indicating wheels 51,were swung more or less in the anti-clockwise direction round the shaft 64 in the setting operation correspondingly to the set value. I

As soon as the adjusting and indicating wheels 51 are swung in the clockwise direction in consequence of the action of the beam 16, the actuator segments I9 standing in engagement with the adjusting and indicating wheels 51, so far as in the denomination concerned a value was set, are also acted upon in the arrow direction I40 (Figs. 1 and 2).

Coupling and driving mechanism for total takin In a bracket 239 (Fig. 4) fixed in any suitable manner to the machine frame 33, a stub shaft 240 is rotatably mounted, which shaft is arranged in axial alignment with the shafts I2 and II6. On the stub shaft 240, a ratchet wheel I is rigid y mounted. The key lever 6 is pivoted at 243 (Figs. 3 and 4) of a U-shapedpart 244 (Fig. 17) mounted on the right hand side wall of the machine frame 33, the lever being normally maintained in its position by the spring 246 (Fig. 4) engaging the hook 241 of the lever 6 and the stationary bolt 248. The abutment or stop 249 contacting with the hook 241 of the lever 6 limits its pivoting action in one direction. The abutment or stop 249 is fixed to the machine frame by means of a bracket (not shown). a

When the key 8, which is marked with "T is depressed, the lever 6 is rocked on its pivot 243 clockwise, whereby the nose 25I of the pawl 252 is released by means of the rearwardly directed arm of the key lever6. Since the pawl 252 is movable on thecam disc 253, which is rotatably mountedon the shaft 240, the pawl'252 is thus caused to move in the direction indicated by the arrow 254 by the compression spring 255 (Fig. 3). Consequently, the nose 256 of the pawl 252 engages with the continuously rotating ratchet wheel MI. The cam 253 is thus coupled with the ratchet wheel 24I. k

In order to maintain the cam disc 253 in its normal position shown in Figure 3, the cam 253 is secured to a disc 251 on which is rotatably mounted a roller 258 on the opposite side of the cam 253. The said roller 258 cooperates with the lever 259 which is also mounted on the-pivot 243 and is always kept in contact with the roller 258 by a spring 260 secured to the lever 259 and also at 26I on the machine frame. Since the end'of the lever 259 does not bear against the stop 249, the cam disc 253 will always be'urged in the direction of the arrow 262 by the spring 260 acting through the lever 259, the roller 258 and the disc 251, while-the rotation of the cam disc 253 is prevented by the lug-25l of the pawl 252 contacting the end of the lever B and consequently the cam disc 253 is maintained in its normal position. 7

From the foregoing, it results that if the key 8 is depressed and immediately released, the-disc 251 will perform. one revolution only, which rotary movementistransmitted to the stub shaft- '240 through the levers 263, 264 from the stub shaft I I2, which in its turn receives its driving movement from the coupling I 02.

Prior to the completion of a revolution of the stub shaft 240, the roller 258 of the disc 251 comes in contact with the curved end of the lever 259 and rocks the same on its pivot 243 counterclockwise against the action of the spring 260 engaging therewith until the roller 258 goes beyond the dead centre. From this moment the lever 259 exert a driving action on the roller 258 and on the cam disc 253, whereby a rotary motion independent of the stub shaft 240 is imparted to the cam disc 253 to simultaneously impart a lead of the cam disc 253 relative to the stub shaft 240 and the ratchet wheel 24I respectively, thereby facilitating the uncoupling of the pawl 252 from the ratchet Wheel 24I.

Total taking mechanism To the disc 251 described under the chapter Coupling and driving mechanism for total-taking, is jointed a rod 265 (Figs. 2 and 3) by means of the pin 266 and this rod is in articulated connection with a lever 261 rigidly mounted on a shaft 268 which is rotatably mounted in the two side walls of the machine frame 33. On the shaft 268, further, a toothed segment 269 is rigidly mounted which is adapted to co-act with parts to be later described in detail.

On the tooothed segment 269 is formed a nose 210 which is'adapted to co-act with a nose 21I bent off at right angles on one arm of a bail 212, 213. The bridge 213 of the bail 212, 213, is adapt? ed to co-act with the three-armed levers I94. When the segment 269 is rocked clockwise, the nose 210 rocks the bail 212, 213 anti-clockwise and maintains the same in its rocked position by means of the concentric part 214 of the segment 269, in which position the tens transfer levers I94 are locked for total taking.

On the total key lever 6 is formed a lug 215 (Figs. 1'1 and 2) which engages over the key lever 4 and is adapted to co-act with this key lever in a manner to be hereinafter described.

On the total key 6 is formed a nose 211 which is adapted to co-act with the forwardl directed arm of a shifter lever 218 pivotally mounted on an angle member 219 (Fig. 17) attached at 280 to the right hand side wall of the machine frame 33. On the rearwardly directed limb of the shifter lever 218 is arranged a pin 28I (Fig. 5) which projects into a ring groove 282 of a ring groove sleeve 263. The ring-groove sleeve 283 is rigidly mounted on the shaft I25. By means of a spring 284 which on the one hand lies against the right hand side wall of the machine frame and on the other hand lies against the ring groove sleeve 283, the sleeve 283 and the shaft I23 are influenced oppositely to the direction of the arrow 266 (Fig. 1'1). The normal position of the shaft I25is determined by the striking of a collar 285 (Fig. 1'1) against the left hand side wall of the machine frame 33. Further, a driving wheel I24 (Figs. 1, 5 and 1''!) is fixed to the shaft I25 andis in engagement with a toothed wheel I20 arranged on the shaft H6, the wheel I20 being twice as broad as the toothed wheel I24 so that the toothed wheel I24 remains in engagement with the toothed wheel I20 when the shaft is displaced in the arrow direction 286 (Fig. 17) in a manner to-be hereinafter described.

Besides the cam I28 for addition, a second cam I21 for total taking-is mounted on the shaft I25 which cam-I21 is constructed as shown in 5 and is adapted to cooperate with the totalizer controlling lever I30.

In the shaft I92 (Figs. 2 and 6) is located a half round groove in which a rotatable or oscillatable key 281 seats, and this key is peripherally curved in the zone of the wheels I85 at 288 corresponding to the arc of the circumference of the shaft I92 so that the arc-shaped face 288 and the remaining circumference of the shaft I92 form a normally continuous cylin drical surface. At its left-hand end the rotatable key is provided with a second short face 289 displaced in relation to the face 288. The face 289 on the displacement by rotation of the rotatable key 281 in the opposite direction to the arrow 290 is likewise adapted to form a cylindrical surface with the remaining surface of the shaft I92. In the normal or home position (Figs. 6 and 8) of the shaft I92, the edge of the face 289 of the rotatable key 281 lies against the locking edge 29I of the hole 292 in the left hand side wall of the totalizer frame I33.

The shaft I92 is provided with collars 293 (Figs. 6 and 7). On each pair of such collars runs a wheel I85 which is provided in its bore 294 with a cam 295, This lies in the ring groove 296 formed by each pair of collars.

If the rotatable key 281 is located in the normal or home position illustrated in Figs. 6 and 8, the wheels I85 can freely rotate in each direction since the cams 295 lying in their bores 294 can freely rotate past the rotatable key 281.

On the right-hand side wall of the totalizer frame I33 the shaft I92 is mounted with its reduced journal 291 in the bearing 298 provided with a counter-sink 299 (Fig. 6), having a locking cam 300 (Figs. 6 to 10) which is adapted to co-act with the rotatable key 281 on rotation of the shaft I92 in the arrow direction 290. The right-hand end 291 of the shaft I92 projects through an elongated hole 30I of the right-hand side wall 302 of the totalizer casing.

On the journal 303 of the shaft I92 is fixed a toothed wheel 304 which is capable of being driven by the toothed segment 289 (Fig. 2) in the arrow direction 290 (Figs. 6 and 8 to 10) when the segment 269 is swung in the arrow direction 305.

The shaft I25 (Fig. 17) is provided with ring grooves 306 and 3I4 with which a pawl 301, see also Fig. 1, is capable of engaging, the pawl being pivoted at 308 on a bracket (not shown) arranged on the machine frame in any suitable manner. By means of a torsion spring (not illustrated) the forward end of the pawl 301 is pressed upwards against the shaft I25. The tail of the pawl 301 is adapted to co-act with a cam 309 arranged on the shaft II6.

Total taking If, for example, a total is to be taken from the totalizer I6 (Fig. 1), first of all, the totalizer is brought into the working position and the total key 8 (Fig. 4) is depressed whereon the following operations occur.

By depressing the key 8 of the key lever 6 the coupling 24I, 252 is closed, as described under the chapter Coupling and driving mechanism for total taking.

On depression of the total key 8 the incline 211 (Figs. 1, 17 and 18) formed on the key lever 6 acts on the lever 218, whereby the latter is swung round the screw M in the clockwise direction. As a result, the ring groove sleeve whereby the cam disc I28 moves out of the working position in relation to the nose I29 of the lever I30 and the cam I21 moves into the working position with the nose I29 of the lever I30. At this moment the forward arm of the pawl 301 springs into the ring groove 306 of the shaft I25 and holds the parts 283, I24, I21, I28 on the shaft, in the displaced position.

In the swinging of the lever 218 in the clockwise direction round the screw 3I0, the part 3 formed as shown in Fig. 18 is shifted to the left whereby the face 3I2 of the part 3 is positioned over the key lever 4, depressed through the lug 215 of the depressed total key lever 6. Consequently, on the release of the total key 8 prior to the completion of the total taking operation, the lever 4 is prevented from returning to its normal position.

As has been explained under the chapter Operation of the drive for the adding and printing mechanism on depression of the lever 4, the coupling I02 is closed and the shaft I2 commences to rotate in the arrow direction 22.

During the rotation of the coupling I02 and the shaft I2 in the arrow direction 22, the shaft II6 (Fig. 16) is driven in the direction of the arrow II5 by means of the parts I08 (Fig. 4) 2, I I3, H4 in which rotation the toothed wheel I20, arranged on the shaft II6 also participates. Since the toothed Wheel I20 (Fig. 1) is in engagement with the toothed wheel I24, the cams I21 and I28 are rotated in the direction of the arrow I26 to enable the raised part of the cam I21 (Fig. 5) to wipe against the nose I29 of the lever I30 and swing the same in the anticlockwise direction round the shaft I against the action of the spring I8I. The nose I3I of the lever I30 thereupon is pressed against the lug I32 of the totalizer frame I33, to rock the totalizer frame round the shaft I34 (Fig. 2) in the clockwise direction against the action of the spring I81 so that the toothed wheels I34a move into engagement with the teeth of the racks I35.

As described above under the chapter Coupling and driving mechanism for total taking, the shaft 240 is coupled with the discs 253, 251 on the depression of the total taking key 8. On the before mentioned movement of the parts I08, H2, H3, H4, the shaft 240 and the parts 253, 251 coupled therewith are driven in the arrow direction II5 by the parts H2, 264, 263 (Fi 4).

By this rotation of the disc 251 the connecting rod 265, jointed to it by means of the pin 266, is actuated and swings the lever 261 (Fig. 2) which is jointed to it and which is rigidly mounted on the shaft 268, in the clockwise direction. In the swinging movement of the lever 261 participates also the toothed segment 269 rigidly mounted on the shaft 268 and this toothed segment in one revolution of the disc 251 is swung once to and fro. At this point it may be mentioned that the disc 251 only makes one revolution. At the commencement of the actuation of the segment 269 the projection 210 arranged on the same acts on the nose 21l of the bail 212, 213 and swings the same in the anti-clockwise direction whereby the bridge 213 of the bail 212, 213 is rocked into contact with the downwardly projecting arms I98 of the levers I94, to lock the levers I94 so that the tens transfer levers I90 are held in the path of the tens transfer cams I09 (Fig. 6) of the toothed wheels I85. The tens transfer levers I90 are held in this position by the reciprocating cam running concentrically with the pivot of the segment 889.

The segment 269 in its swinging movement in the arrow direction 305 drives the wheel 394 lying opposite to it in the arrow direction 290, whereby the shaft I92 is likewise rotated in the arrow direction 290 from the position according to Fig. 8 to the position according to Fig. 10, which movement is approximately through 340 degrees of the revolution. In this rotation the control cam 29I of the bearing 292 of the left hand side wall of the totalizer frame acts on the surface 289 of the rotatable key 281, to cause the key to rotate in the opposite direction to the arrow 290. Consequently, the edge 3| 3 of the part 288 of the rotatable key 281 projects beyond the periphery of the shaft I92 and acts as driver for the cams 295 of the wheels I85, whereby these and the numeral wheels I83 in connection with them are carried back to zero. The zeroizing is finished as soon as the edge 3I3 of the rotatable key 281 strikes the cam 300 (Fig. 10) located in the counter-sink 299 of the right hand side wall of the totalizer frame.

Simultaneously in this zero position of the wheels I85, the tens transfer cams I89 (Figs. 6 and 10) of the wheels I 85 strike against the noses I90 of the tens transfer levers I9I, which levers I9I are brought to their working positions with regard to said transfer cams I89 and locked in the same in the manner above described. Thereby an overthrow of the reset wheels I85 and the number wheels I83 is prevented.

Since the shaft I92 does not make a complete revolution but is rotated only through 340 degrees, the shaft I92 does not come to its home position shown in Fig. 8. The lock 289, 29I may only be operated when the resetting parts are in the home position, while the lock 289, 29I is prevented from action by the coaction of the face 239 of the rotatable key 281 with the inner circumferential face of the bearing 292 of the totalizer casing I33, when the resetting process is finished, as shown in Fig. 10. Accordingly, in this position the resetting shaft I92 is released for the return movement in a direction opposite to the arrow 298.

At this moment, the segment 269 has finished its swinging movement in the arrow direction 305, whereby the connecting rod 285 is in its second dead center position.

As soon as the engagement of the totalizer has taken place, the toothed sectors I36 and I31 (Fig. 16) are acted upon in the arrow direction I40 by the levers H 8 and H3. Since the member I38 is attached to the toothed sectors I35 and I31 this member also travels in the arrow direction I40,

whereby the noses I39 of the actuator sectors I9 are released and consequently the actuator sectors I9 are unlocked. In this operation the toothed segments I4! and I42 which are in engagement with the toothed sectors I38 and I31 are swun round the shaft 64 in the clockwise direction inwhich swinging movement the beam 16 projecting into the recesses I43 and I44 of the toothed sege ments MI and I42 also participates.

In the swinging movement of the beam-18 in the clockwise direction round the shaft 64 the beam remains inoperative on the adjusting and indicating wheels 51, since these wheels are in the totalizer casing. In the swinging of the total- The positioned types are impressed upon the paper carried by the platen I61 by means not pertinent to the present invention.

After one-half of a revolution of the main drive.

haft I2 the coupling casing I02 and the mechanisms in connection with it have come to rest as above described under the chapter Operation of the drive for the adding and printing mechanism."

As soon as the zeroizing of the wheels I .of the totalizer located in the working position or the printing of the total has been effected, the nose I29 (Figs. 1 and 5) of the totalizer rocking lever I30 slides off from the raised part of the cam I21, whereby the lever I30 is swung in the clockwise direction under the action of the spring IBI. In consequence of this the totalizer frame arranged in the totalizer casing can now swing round the shaft I34 in the anti-clockwise direction under the action of the spring I81, the swinging move: ment being limited by contact of an edge of the totalizer frame against the pin I88 arranged on iz'er frame in the anti-clockwise direction round the shaft I34 the toothed wheels I341; are disengaged from the teeth of the racks I35, whereby the driving connection of the racks I35 with the totalizer located in the working position is interrupted.

As soon as the nose I29 of the totalizer rocking lever I30 has again moved from the raised part of the cam I21 on to the lower part of the same, the cam 309 acts on the pawl 301 and swings the same round the pin 308 in the clockwise direction against the action of the torsion spring (not illustrated) whereby the forwardly extending arm of the pawl 301 moves out of the ring groove 396 of the shaft I25 and accordingly the shaft I25 and the parts 283, I24, I21 and I28 (Fig. 5) arranged 'on it, are axially returned under the action of the spring 284 against the arrow direction 288.

Thereby the forwardly extending arm of the pawl 301 (Figs. 1, 5 and 17) enters the ring groove 3I4 of the shaft I25, whereby the shaft I25 and the parts 283, I24, I21, I28 fixed to the same are arrested in their returnmovement before said parts have come to their final home positions. In this position the nose I29 of the lever I30 is in contact with the arcuate surface 3I6 connectin the cams I21, I28 the radius of which part 3I8 corresponds to the lower part of the cams I21, I28.

In the swinging of the lever 218 i the anticlockwise direction under the action of the spring 294, the face 3I2 of the offset 3 (Fig. 18) also releases thekey lever 4, whereby the key lever 4 under the action of its spring 88 is rocked round the screw in the anti-clockwise direction into its position illustrated in Fig. 12,

so that the coupling casing I02 again participates i the further rotation of the shaft I2 as above described under the chapter Operation of the drive of the adding and printing mechanism.

For the remainder, the operations hereinbefore described occur, for which reason these shall not be described further. Similarly the parts I58, I60, I6I, I62, I41, I48, I49, I50, I52, I53, I54, I56 are returned to their rest positions in the manner above described, under the chapter Operation of the printing mechanism.

In said further rotation of the coupling casing I02 in arrow direction 22 the toothed sectors I36 (Fig. 16) and I31 during the second half of the revolution of the levers H1 and H4 are moved by way of the levers H8 and I I3 through the intermediary of the parts I08, H2 in the opposite direction of the arrow direction I40, whereby the toothed segments HI and I42 standing in engagement with the toothed sectors I36 and I31 are acted upon round the shaft 64 in the anti-clockwise direction, whereby the beam 16 is likewise swung in the anti-clockwise dlrection into the normal position.

Besides the actuator sectors I9 are naturally also brought back into the rest position by the beam I38 fixed to the toothed sectors I36 and I31 in consequence of its action on the noses I39 of the actuator sectors I9.

During said second half revolution of the parts above described, the pawl 301 slides upon the raised part 3I5 of the cam 309. During this movement the totalizer rocking lever I30 is held in working position with regard to the part 3l6 of the cams I21, I28 by the co-action of the pawl 301 with the ring-groove 3I4 in the manner above described. Since the radius of the part 3 I6 corresponds to the lower part of the cam I21, I28, the lever I30 may not be operated by the part 3I6 during this second half revolution of the machine parts including the shaft I25. Accordingly the wheels I34 of the totalizer do not come in engagement with the toothed sectors I35 of the printing sectors I9. Consequently it is not possible to bring the value which was cancelled from the totalizer again into the same by the above-mentioned return movement of the printing sectors I9, which is effected during the second half revolution of the machine part.

Shortly before the completion of the second half revolution of the machine parts including the shaft H6 and the cam 309 fixed upon the shaft II6, the cam 309 acts with its raised part 3I1 upon the pawl 301 and rocks the same against the action of its torsion spring further in the clockwise direction. Thereby the pawl 301 disengages from the ring groove 3I4 of the shaft I25. Consequently, the shaft I25 and the parts 283, I24, I21 and I28 fixed thereon are moved back under the action of the spring 284 in the arrow direction 286 to the home position (Fig. 17). In this position the lever I30 is again in working position with regard to the adding cam I28.

As described under the chapter Coupling and driving mechanism for total taking, the coupling of the shaft 240 with the cams 253, 251 for one revolution is effected, whereby on the revolution of the disc 251 the parts 265, 261, 258, 269 are also operated. Thereby the toothed segment 269 is moved back in the opposite direction of the arrow 305 during the second half revolution of the disc 251, whereby the same operates the toothed wheel 304 and therewith the resetting shaft I92. Thereby the wheel 384 and the resetting shaft I92 are reversely rotated from the resetting position shown in Fig. 10 to the home position shown in Fig. 8. This is possible, since the lock 289, 29I may not be effective in the resetting position as described heretofore. The gearing parts of the totalizer including the number wheels I83, which are reset to zero position by the resetting shaft I92 do not take part in the return movement of the shaft I92, since the friction of their bearings and the interengagement of the teeth of the denominational trains of wheels are greater than the frictional engagement of the gears I with the shaft I92. At the end of the return movement of the shaft I92 in the opposite direction of the arrow 290 the face 288 of the rotatable key 281 Wipes under the cam 300 (Fig. 8), which operates to turn the key 281 in its seat, to its normal position, so that the lock 289, 29I is again effected. In this home position the resetting shaft I92 cannot be rotated in the opposite direction of the arrow 290. At the end of said return movement of the parts 253, 251, 265, 268, 269, that is, after one revolution of the discs 253, 251 the coupling 252, Ml (Fig. 4) is again released as described under the chapter Coupling and driving mechanism for total taking. In the home position of the segment 269, the bridge 21I, 213 is again released from the part 214 of the segment 269, whereby the lever I94 described above for holding the tens transfer lever I is again released.

Shortly before the completion of a revolution of the coupling casing I02 (Fig. 12) the nose 93 of the coupling pawl 94 acts on the nose IOI of the part 98 which, after the release of the addition key 84, was moved with its nose IOI into the path of movement of the nose 93 of the coupling pawl 94. In consequence of this, the coupling pawl 94 is swung round the pin I05 in the clockwise direction against the action of the spring I03 So that the nose I06 of the coupling pawl 94 moves out of engagement with the cam I01, so that the coupling casing no longer participates in the revolution of the main drive shaft I2 and the mechanisms are held in their rest positions.

I claim:

1. In a totalizer normalizing device, a frame having journal bearing openings, a longitudinally grooved shaft rotatably mounted therein, a series of wheels rotatably mounted directly on the shaft, a normalizing key oscillatable in the groove to effective or ineffective position with respect to said wheels, angularly offset faces on said key, said frame defining an indentation at one of the bearing openings for receiving one of said offset faces when the key and shaft are in their ineffective positions and coacting with said face to rotate the key into effective position upon rotation of the shaft in one direction, means to rotate the shaft while the key is in its effective position, to restore the wheels to normal, and means at the other bearing opening coacting with the other of said offset faces to restore the key to its ineffective position during rotation of the shaft in the opposite direction.

2. In a totalizer normalizing device, a frame including two end members provided with openings, a shaft rotatably mounted in said end members havin a series of spaced annular grooves and a longitudinal groove, a plurality of wheels rotatably mounted on the shaft and having lugs entering the annular grooves, a key angularly movable in said groove and having an edge engageable with the lugs, means to rotate the shaft while the key is in its effective position, to restore the wheels to normal position, angularly ofiset cams, one at each end of the key, arranged i the said openings, a cam face in one of said openings to cooperate with one of the offset cams to rotate the key in an opposite direction to the direction of rotation of the shaft at the beginning of shaft rotation, and a lug in the other of said openings to cooperate with the other of the offset cams on the key to rotate the key in an opposite direction to the rotation of the shaft near the end of the rotation of the shaft in a direction opposite to that in which the shaft 5 was first rotated.

AUGUST FRIEDRICH POTT. 

